Hypergraph-based connectivity measures for signaling pathway topologies

Data and source code for (nearly) all figures and experiments the following paper:

Nick Franzese, Adam Groce, T.M. Murali, and Anna Ritz. Hypergraph-based connectivity measures for signaling pathway topologies. PLOS Computational Biology 2019; 15(10): e1007384. (publisher link)

Before publication in PLOS Computational Biology, this work was presented at GLBio 2019 (as an accepted paper, see versions on bioRxiv and at ISMB 2019 (as an accepted poster).

Email Anna (aritz@reed.edu) with any questions about this code base.

Dependencies

Most of the experiment options require these tools:

• Python (tested with v3.5.1 and v3.8.2)
• Hypergraph Algorithms Library in Python (HALP)
  • Check out annabranch (this passes all pytest tests; there are currently some issues with Travis CI)
• NetworkX (v1.11, should work with v2.1)
• xlsxwriter to write permutation test information to an Excel file.
• matplotlib_venn to visualize venn diagrams.

If you want to implement shortest B-hyperpath on directed graphs, it is implemented as a cplex integer linear program. CPLEX will be imported if --histograms is specified, since it is used in the connectivity survey.

• IBM ILOG CPLEX optimizer Python module (academic license available)

Datasets

The data is generated from the Reactome Pathway, available via PathwayCommons. PC v10 files available here. See details in the data/ directory for more information.

To run all analyses, you must generate the following datasets:

• Simple Interaction Format (SIF, instructions in data/)
• Hypergraph, Bipartite Graph, and Compound Graph (OWL, instructions in data/)

The four data representations (hypergraph, bipartite graph, directed graph, and compound graph) are available in this repo. To re-generate all representations, you can run the scripts outlined in the src/ directory.

Usage Information

The main function is run.py in the src/ directory:

usage: run.py [-h] [--force] [--printonly] [--keep_singletons] [--small_molecule_filter]
              [--ubiquitous_filter] [--stats] [--histograms] [--perm_test #PERMS] [--set_seed]
              [--case_studies] [--string_channels]

Run experiments for pathway connectivity. The four representations are "SIF-Graph","Compound
Graph","Bipartite Graph", and "Hypergraph"

optional arguments:
  -h, --help            show this help message and exit

General Arguments:
  --force               force existing files to be overwritten (default=False)
  --printonly           print the commands instead of running them (default=False)

Dataset Arguments:
  --keep_singletons     Keep singleton nodes. Default False.
  --small_molecule_filter
                        Filter by small molecule nodes
  --ubiquitous_filter   Filter by PathwayCommons ubiquitous nodes

Experiment Arguments:
  --stats               print statistics about each representation.
  --histograms          print histograms and heatmaps for each representation.
  --perm_test #PERMS    pathway influence permutation test with #PERMS number of permutations.
  --set_seed            Set the seed of the random number generator to 123456. Default False.
  --case_studies        pathway influence case studies (hard-coded)
  --string_channels     run STRING channel assessment.

Refer to the README.md files for more commands to generate data, run experiments, etc.

Developer Notes

• We need to put this in a virtual environment or dockerize it.
• TravisCI testing fails for the hypergraph algorithms library (halp). However, the annabranch branch (which includes tests for B-Relaxation Distance) have all unit tests passing.
• There are two places where we describe PaxTools and downloading the JAR (src/BioPAXSTREAM and src/hypergraph_code/hypergraph_parser).Further, there are two versions of the JAR file needed. Combine this (or better yet wrap it into an easy install script).
• src/BioPAXSTREAM/ code still has some hard-coded lines in it. Currently users are instructed to replace these lines; they should be put in a command-line-argument.
• The hypergraph/ directory at the top level is out of place (for historical reasons). It needs to be movable and other scripts shouldn't have it hard-coded.

Developer Log

Jun 2020: Renamed "blacklisted" files to "ubiquitous" files in response to the racist connotations with using "blacklist" and "whitelist." Read more about GitHub's phrase changes, and look through your own repos to remove racist terminology.

Jun 2020: Tested code on Python v3.8 and changed scipy.stats to scipy.special package in visualization script.

Sep 2019: Code to parse the Reactome OWL files into hypergraphs are now documented in src/hypergraph_code/hypergraph_parser/.

Aug 2019: Full dependencies, code for generating almost all pathway representations (hypergraphs, bipartite graphs, compound graphs, and directed graphs) are now here. Third-party datasets are also documented. Email Anna with any questions.

May 2019: This repo is still a little rough, Anna plans to refactor code and update instructions for data acquisition and processing in the next few weeks. Email her if you have questions.